I have installed an application, when I try to run it (it’s an executable jar) nothing happens. When I run it from the commandline with: java -jar “app.jar” I get the following message: no main manifest attribute, in “app.jar” Normally, if I had created the program myself, I would have added a main class attribute … Read more
I have installed OpenCV on the Occidentalis operating system (a variant of Raspbian) on a Raspberry Pi, using jayrambhia’s script found here. It installed version 2.4.5. When I try import cv2 in a Python program, I get the following message: The file cv2.so is stored in /usr/local/lib/python2.7/site-packages/… There are also folders in /usr/local/lib called python3.2 … Read more
os.walk returns a generator, that creates a tuple of values (current_path, directories in current_path, files in current_path). Every time the generator is called it will follow each directory recursively until no further sub-directories are available from the initial directory that walk was called upon. As such, So or this or if you want to look … Read more
Launch Windows PowerShell, and wait a moment for the PS command prompt to appear Navigate to the directory where the script lives PS> cd C:\my_path\yada_yada\ (enter) Execute the script: PS> .\run_import_script.ps1 (enter) What am I missing?? Or: you can run the PowerShell script from cmd.exe like this: according to this blog post here Or you … Read more
Note: For MySQL 5.7+, please see the [answer from Lahiru] to this question. That contains more current information. For MySQL < 5.7: The default root password is blank (i.e., an empty string), not root. So you can just log in as: You should obviously change your root password after installation: In most cases you should … Read more
You’re probably dividing by zero or some other nonsensical number. Are you sure real and imag for IFFTOutput[i] isn’t zero? Print it out just before perhaps?
kill” will only kill one screen window. To “kill” the complete session, use quit. Example For dead sessions use: $ screen -wipe
When doing; …you’re trying to open a directory as a file, which may (and on most non UNIX file systems will) fail. Your other example though; should work well if you just have the permission on a.txt. You may want to use a raw (r-prefixed) string though, to make sure your path does not contain … Read more
Ubuntu Linux/Mac: The module n makes version-management easy: For the latest stable version: For the latest version: Windows: just reinstall node from the .msi in Windows from the node website.
YAML supports inline comments, but does not support block comments. From Wikipedia: Comments begin with the number sign ( # ), can start anywhere on a line, and continue until the end of the line A comparison with JSON, also from Wikipedia: The syntax differences are subtle and seldom arise in practice: JSON allows extended … Read more